KR960013814B1 - A recognizing device of edge and letters made in tire sidewall - Google Patents

Abstract

The device is designed to recognize the rim or embossed letters formed on the sidewall of a tire. The device includes : a linear guide (10) installed across a side wall section (1) of a green tire; a laser sensor (12) mounted to opposite side of the side wall section (1); an encoder (13) for generating pulse whenever the laser sensor (12) moves a specified distance; and a computer for calculating the distance moved and comparing surface distance of the side wall section (1) by receiving pulse detected by the laser sensor (12).

Description

Tire side world rim and character recognition device

1 is a schematic plan view of an edge recognition apparatus according to the present invention.

2 is a schematic plan view of a character recognition apparatus according to the present invention.

3 is a schematic plan view of a tire having a rim protruding from the side world.

(b) is a fragmentary sectional view taken along the line A-A of FIG.

4 is a schematic plan view of a tire in which letters are embossed on the sidewalls.

* Explanation of symbols for main parts of the drawings

1: sidewall part 2: border (white)

3: character (white) 4: bead part

10: linear guide 11: driving motor

12: laser sensor 13: encoder

14: Bead clamp.

The present invention relates to a device for recognizing the rim or embossed letters formed on the surface of the tire sidewall.

In order to give a sense of the tires that are currently produced, as shown in (a) and (b) in FIG. 3, the white rims 2 protrude from the sidewall part 1 at a height of a small height. White tires (3) representing the manufacturer are embossed, and these tires are made of white tires wrapped in a molding drum, put into a airflow, and then powdered, followed by sidewalls containing white rubber with a buffing machine. It is manufactured through a process of grinding white to expose white on the surface.

In order to sort out the green tires containing white rubber from the green tires vulcanized in the vulcanizer during the manufacturing process and send them to the buffing process, the worker has screened the green tires with the protruding edges with the naked eye. Manpower was needed and there was a problem that was not accurate.

In order to solve this problem, there has been a conventional method of recognizing the edges of the text using a camera as part of the automation process, but the green tires vulcanized in the vulcanizer are difficult to recognize because the surface is black and the text is embossed or engraved. However, the camera itself was sensitive to lighting, so it didn't get much effect.

Accordingly, the present invention has been invented to solve the above problems, by using a laser sensor to automatically recognize the letters and protruding edges embossed on the tire sidewalls can accurately sort and achieve automation of the tire manufacturing process It is an object of the present invention to provide a tire sidewall rim and a character recognition device.

The present invention for achieving the above object is a linear guide installed across the sidewall portion of the green tire, and a laser sensor fixed toward the sidewall portion to be moved by the drive motor along the linear guide, this laser An encoder that generates a pulse every time the laser sensor moves by a predetermined distance to calculate the movement distance of the sense, and a laser sensor receives a pulse generated by the encoder to calculate the movement distance of the laser sensor by a predetermined distance. The encoder generates pulse every time it moves and the distance generated by the laser sensor is calculated by receiving the pulse generated from this encoder, and the front and rear distance difference value of the sidewall detected by the laser sensor is a predetermined value from + to-. As described above, the edge is recognized as a discrimination condition in which the distance between the + value and the-value is greater than or equal to the predetermined value.

In addition, a bead clamp is provided to fix the bead portion of the green tire to rotate clockwise or counterclockwise. The bead clamp detects letters embossed in the arc direction while rotating the green tire.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Tire sidewall edge recognition device according to the invention as shown schematically in FIG. A linear guide (10) installed across the sidewall portion (1) from the outside of the green tire to detect the edge (2) protruding from the sidewall portion (1) of the black green tire vulcanized in the vulcanizer; A linear guide, a laser sense 12 mounted toward the sidewall portion 1 so as to be moved by the drive motor 11 along the linear guide 10, and the movement distance of the laser sensor 12 is calculated. In order to calculate the moving distance of the laser receiver 12 by receiving the encoder 13 which generates a pulse every time the laser sensor 12 moves by the small distance, and the pulse generated by the encoder 13, It is a structure equipped with a computer for comparing the surface distance of the side wall portion (1) sensed by the laser sensor 12.

In the frame recognition apparatus according to the present invention having the above-described structure, first, when the driving motor 11 is driven, the laser sense 12 is moved across the sidewall part 1 along the linear guide 20. The encoder 13 generates one pulse each time the laser sensor 12 is moved by a predetermined distance (preferably 0.5 mm) and is input to the computer. The distance to the tire surface measured by the laser sensor 12 is also measured. It is input to the computer.

The computer stores the distance traveled by the laser sensor 12 by calculating the number of pulses input from the encoder 13, and compares the surface distance detected by the laser sensor 12 every 0.5 mm movement to calculate the difference value. Since the edge 2 has a height of 3-4 mm and a flat width of 8-30 mm, the front and rear difference value of the surface distance detected by the laser sensor 12 is 3-4 mm or more. If the difference between the front and rear ends is measured at every 0.5 mm, the distance between the front and rear ends is almost constant, that is, after the distance lasts at least 8 mm. It is recognized as a diamond.

More specifically, since the edge 2 usually has an 8-30 mm flat width while protruding at a height of 3-4 mm from other portions of the side wall portion 1, the laser is directly below the edge 2. The front-end difference value of the distance measured by the sensor 12 and the distance measured at the site where the edge 2 starts is almost unchanged since the edge 2 is in a flat plane. Since the difference between the front and rear ends at the end of) will be -3 to -4 mm, the back and forth difference value starts with a plus (+) and changes to a negative (-), and the plus and backward difference value and (- If the distance between negative front and rear difference values is 8 mm or more, it is determined as a tire having a rim 2.

By the way, the side wall portion (1) of the tire is not the entire portion including the rim (2) is not completely flat, for example, a protrusion having a width of 3mm with a height of 4mm or more may be formed in some cases. In this case, the front and rear difference value changes from (+) to (-) and the absolute value becomes 3 mm or more, but since the fluctuation range of the front and back difference value does not become 8 mm or more, You can do it.

On the other hand, as described above, the rim 2 having a predetermined height and width is not formed at 360 degrees, and some tires are embossed with a predetermined height as shown in FIG. The embossed tires are also sent to the buffing process to highlight the letters, and the surfaces of the letters are ground to white.

The tires embossed as described above cannot be detected by the rim recognition device, because when the laser sensor 12 passes between the letters and the letters, the variation of the front and rear difference value and the distance of change are the requirements (front and rear difference value). : 3 to 4 mm, the distance between the points of occurrence of the difference value; 8 mm or more).

In this case, the present invention was to measure the tire is engraved with the embossed letters by measuring along the area where the letters are embossed without measuring across the sidewall with a laser sensor, that is, Figure 2 is a character recognition apparatus according to the present invention As shown, the letter 3 is embossed while forming an arc shape at a portion 40 mm away from the tire nasal head 4, so that the letter is embossed when the surface distance is measured by the laser sensor 12 along the arc shape. It can be detected.

In more detail, the tire that is determined to have no rim in the rim recognition device is sent to the character recognition device to determine whether the letters are embossed, and the tire sent to the character recognition device is attached to the bead clamp 14 in the center. And the tire rotates at a predetermined speed. In this case, since the laser sensor 12 is fixed to a portion 50 mm away from the bead portion 4, the tire is clocked or counterclockwise through the bead clamp 14. When rotated in the direction, the laser sensor 12 measures the surface distance.

In this case, the determination method for determining whether the character is embossed is the same principle as the above-described frame recognition method. Since the height of the character 3 is almost the same height as the edge 2, the width is different. What is necessary is to reduce the discrimination condition for the width.

As explained above. According to the tire sidewall rim and the character recognition device according to the present invention, by simply detecting whether there is a character or rim on the sidewall of the tire via a laser sensor, it is possible to automatically classify the tire accurately and work force Since it can be reduced, not only can the manufacturing cost be lowered, but also the effect of automating the tire manufacturing line can be achieved.

Claims (3)

The linear guide 10 installed across the side circle portion 1 of the green tire, and the laser sensor fixed toward the side wall portion 1 so as to be moved by the drive motor 11 along the linear guide 10 ( 12) In order to calculate the moving distance of the laser sensor 12, the encoder 13 generating a pulse every time the laser sensor 12 moves by a predetermined distance, and the pulse number generated by the encoder 13 is inputted to the laser. A computer for calculating the moving distance of the sensor 12 and comparing the surface distance of the sidewall part 1 detected by the laser sensor 12 is provided so that the laser sensor 12 can be moved by a predetermined distance. Determination condition that the detected distance between front and rear distances of the sidewall part 1 is changed from (+) to (-) by more than a predetermined value and the distance between this (+) value and (-) value becomes more than a predetermined value. Tire sidewall edge recognition device to recognize the rim. The tire side according to claim 1, wherein an absolute value of the front and rear difference value is 3 mm or more, and a distance between the (+) front and rear distance difference value and the (-) front and rear distance difference value is 8 mm or more. Moon border recognition device. The bead clamp (14) of claim 1, wherein the bead clamp (14) of the green tire is fitted to be fixed to rotate clockwise or counterclockwise, and the green tire is rotated by the bead clamp (14). Tire sidewall character recognition device, characterized in that to detect the letters embossed in the arc direction.